2026 ICD-10-CM Diagnosis Code B37.0Candidal stomatitis
ICD-10-CM Codes›A00–B99›B35-B49›B37
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B37.0 is a billable ICD-10-CM diagnosis code for candidal stomatitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 157 through 159, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 23 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury; Caries, periodontitis, and other preventable dental conditions; and Diseases of mouth; excluding dental.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute oral atrophic candidiasis
- Acute oral pseudomembraneous candidiasis
- Atrophic mucosa of digestive system organ
- Atrophic thrush
- Candidiasis of esophagus
- Candidiasis of mouth
- Candidiasis of mouth and esophagus
- Candidiasis of mouth co-occurrent with human immunodeficiency virus infection
- Candidiasis of mouth with AIDS
- Candidiasis of oropharynx
- Candidiasis of tongue
- Chronic atrophic candidiasis
- Chronic hyperplastic candidiasis
- Chronic multifocal candidiasis of mouth
- Chronic nodular oral candidiasis
- Chronic plaque-like oral candidiasis
- Chronic pseudomembranous oral candidiasis
- Erythema of mucous membrane of mouth
- Gastrointestinal candidiasis
- Gingivitis caused by Candida
- Hyperplastic thrush
- Mucous membrane erythema
- Oral erythematous candidiasis
- Oral mucosal fungal disease
- Pharyngeal candidiasis
- Pseudomembranous thrush
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Oral thrush
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Aphthae, aphthous See Also: condition;
thrush B37.0
mouth B37.0
oral B37.0
stomatitis B37.0
Disease, diseased See Also: Syndrome;
Muguet B37.0
mouth B37.0
stomatitis B37.0
Parasitic See Also: condition;
stomatitis B37.0
Soor B37.0
Stomatomycosis B37.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Chronic Mucocutaneous Candidiasis
mucocutaneous candidiasis that is persistent or long-standing in nature.
Patient EducationClinical
Mouth Disorders
Your mouth is one of the most important parts of your body. It has many different functions. It allows you to:
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Convert B37.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B37.0Overview
What is the ICD-10 code for candidal stomatitis?
The ICD-10-CM code for candidal stomatitis is B37.0 (sometimes written as B370). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is B37.0 (Candidiasis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report candidal stomatitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B37.0 group to?
When candidal stomatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 157, 158, 159, 974, 975, 976, with relative weights from 0.7085 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B37.0 a CC or MCC?
CMS lists B37.0 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 23 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B37.0?
Under the General Equivalence Mappings, candidal stomatitis converts to ICD-9-CM 112.0 (thrush). The mapping is approximate, so confirm the match fits the documentation.
